@Linda830, I sorry to hear this happened to your daughter's trip!
Based on your message, it sounds like if *you* were traveling to the Pocono's, you would have taken the weather more seriously, left earlier, and made it to the rental. The fact that the other couple made it to the rental despite the weather shows that it was clearly possible to do so.
There would be *some* logic to a refund if it were impossible for your daughter to have made it to the rental. But since the main reason she did not make it there was her failure to listen to your good advice, I imagine you know who bears responsibility for this event.
One silver lining would be if your daughter takes your advice more readily in the future.